If you upgrade to RDM 2021.1.35.0 and do the database upgrade, is it still possible to use RDM klient 2020.2.20 with the same database?
The data source is Microsoft SQL Azure.
No, v2021.1.x is a major upgrade (private vault migration for example) so using 2020.2 on the same database is strongly not recommended.
I would recommend you set the version management values to prevent users from using the wrong version.
https://help.remotedesktopmanager.com/datasourcesettings_versionmanagement.html?q=version
Stéfane Lavergne